One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,15)(12,16)(13,14)(17,18,24,28)(19,31,36,45)(20,37,38,43)(21,27,32,42)(22,30,23,29)(25,35,44,34)(26,33,46,39)(40,48,41,47)(1,3,5,4)(2,6,8,7)(9,10)(11,16)(12,15)(13,14)(17,19,23,35,24,36,22,34)(18,25,30,45,28,44,29,31)(20,21,39,41,38,32,33,40)(26,27,37,48,46,42,43,47)(1,3,5,4)(2,7,8,6)(10,14)(15,16)(17,20,23,39,24,38,22,33)(18,26,30,37,28,46,29,43)(19,32,35,40,36,21,34,41)(25,42,45,47,44,27,31,48)(9,11,13,12)(10,15,14,16)(17,21,24,32)(18,27,28,42)(19,33,36,39)(20,34,38,35)(22,40,23,41)(25,43,44,37)(26,31,46,45)(29,47,30,48)(1,4,5,3)(2,6,8,7)(9,12,13,11)(10,15,14,16)(18,28)(20,38)(21,32)(25,44)(29,30)(31,45)(33,39)(40,41)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.